US seeks swift extradition of Nestor Isidro Perez Salas, alias 'El Nini,' accused of leading security for Sinaloa Cartel faction headed by sons of Joaquin 'El Chapo' Guzman. Perez Salas, captured by Mexican National Guard, is viewed as ruthless drug figure. US Attorney General Garland thanks Mexican authorities for the arrest and seeks extradition to US. Perez Salas faces charges including drug trafficking, possession of weapons, and witness retaliation. $3 million reward offered for his arrest.